CN112662949A - High-strength seamless steel tube for integrally drawn automobile axle housing and production process thereof - Google Patents
High-strength seamless steel tube for integrally drawn automobile axle housing and production process thereof Download PDFInfo
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- CN112662949A CN112662949A CN202011462481.XA CN202011462481A CN112662949A CN 112662949 A CN112662949 A CN 112662949A CN 202011462481 A CN202011462481 A CN 202011462481A CN 112662949 A CN112662949 A CN 112662949A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 3
- 230000006032 tissue transformation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 25
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 9
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of steel production, and particularly relates to a high-strength seamless steel tube for an integrally drawn automobile axle housing, which comprises the following components in percentage by weight: 0.145% of C, 0.275% of Si, 1.425% of Mn1, 0.0335% of V, 0.03% of AL, 0.013% of P, 0.07% of S, and 98.0085% of Fe and impurities. The process comprises the following steps: converter or electric furnace smelting-deoxidation alloying-refining-continuous casting, protective casting-pipe blank sawing-heating-adding re-line temperature monitoring in perforation-adding re-line temperature monitoring in pipe rolling-re-line micro-controlled cooling, adding temperature measurement-micro-tension reducing-middle cooling bed in the working procedure, adding re-line temperature monitoring in the working procedure, cooling in cooling bed air-straightening-sawing, sampling inspection-flaw detection-surface inspection-spray marking and warehousing. On the premise of meeting the axle machining quality, the online normalizing process or the heat treatment process is reduced, and the comprehensive performance of the product is improved.
Description
The technical field is as follows:
the invention belongs to the technical field of steel production, and particularly relates to a high-strength seamless steel tube for an integrally drawn automobile axle housing and a production process thereof.
Background art:
with the recent vigorous development of the automobile industry supported by national industries, the axle assembly has already formed a set of complete industrial chains as the main part of the automobile composition, and the axle housing mainly takes on the functions of driving, bearing and braking. The axle housing is both a bearing member and a force transmission member, and is also a housing for the main reducer, the differential and the drive wheel transmission device. The automobile axle housing is divided into three types of casting integral type (heavy type off-road, engineering machinery), steel plate stamping welding type and steel pipe expanding forming drawing type (light, medium and heavy type freight carrying vehicles and passenger carrying vehicles) according to the manufacturing process, the existing steel pipe expanding forming drawing type processing technology has the characteristics of fast processing and forming, light weight, high strength and toughness, few welding line connection, low cost and the like, and the processing method is widely applied.
However, no clear standard exists in the aspect of key performance indexes of raw materials (steel pipes) used by the axle housing in China, various production enterprises are still in a searching stage, and partial enterprises adopt an online normalizing process or an offline heat treatment process to ensure the performance indexes for ensuring the processing quality of the axle housing. The addition of the alloy to the control structure is optimized for this problem, from the smelting process to the rolling.
A steel pipe expansion forming drawing type automobile axle housing is a novel processing technology (the original technology is a steel plate welding technology) of the existing lorry axle, the requirement on the cold processing performance of a steel pipe is strict (for example, the cold processing temperature of the steel pipe is-20 ℃ in winter when the Jilin axle of a supplier downstream of Changchun-Yi automobile is used), the steel pipe is ensured not to crack or crack in the cold processing process, and the loading effect in the test process after the axle is formed is also required to be ensured. This imposes strict requirements on the low-temperature impact, ductility and strength of the steel pipe.
The high strength seamless steel pipe for current automobile axle housing mainly has two, and one of them is: smelting in a converter or an electric furnace, deoxidizing alloying, refining, continuous casting (protective casting), sawing a pipe blank, heating, perforating, rolling a pipe, reducing (fixing) the diameter by micro tension, reheating a furnace (a re-line normalizing process), cooling in a cooling bed, straightening, sawing (sampling inspection), detecting flaws, inspecting the surface, spraying a mark and warehousing. The second is as follows: smelting in a converter or an electric furnace, deoxidizing alloying, refining, continuous casting (protective casting), sawing a pipe blank, heating, perforating, rolling a pipe, reducing (fixing) the diameter of micro-tension, cooling bed air cooling, straightening, sawing (head and tail cutting), offline heat treatment (normalizing process), cooling bed air cooling, flaw detection, sawing (sampling inspection), surface inspection, and spraying and marking for warehousing. What plays a key role in the product quality in the first process is the reheating furnace (re-line normalizing process) process; the second process, which plays a key role in product quality, is the sawing (end-to-end cutting) -off-line heat treatment (normalizing process) procedure. The key process cannot obtain steel pipes with excellent properties such as low-temperature impact, ductility and strength. Therefore, a new process is provided for the key control procedure of the product quality.
The invention content is as follows:
the invention aims to provide a high-strength seamless steel tube for an integrally drawn automobile axle housing and a production process thereof. On the premise of reducing the use amount of precious alloys, different production processes are formulated for different axles, on the premise of meeting the axle processing quality, the links of an on-line normalizing process or a heat treatment process are reduced, and the comprehensive performance of the product is improved. The product quality is ensured by optimizing the components through the process improvement.
The technical scheme adopted by the invention is as follows: the high-strength seamless steel tube for the integrally drawn automobile axle housing comprises the following components in percentage by weight: 0.13-0.16% of C, 0.2-0.35% of Si, 1.35-1.5% of Mn, 0.027-0.04% of V, 0.02-0.04% of AL, less than or equal to 0.02% of P, less than or equal to 0.01% of S, and the balance of Fe and inevitable impurities.
Further, the steel pipe has a composition and weight percentage of C0.13%, Si 0.2%, Mn 1.35%, V0.027%, AL 0.02%, P0.006%, S0.004%, and Fe 98.263% together with inevitable impurities.
Further, the steel pipe comprises the following components in percentage by weight: 0.145% of C, 0.275% of Si, 1.425% of Mn, 0.0335% of V, 0.03% of AL, 0.013% of P, 0.07% of S, 98.0085% of Fe and inevitable impurities.
Further, the steel pipe comprises the following components in percentage by weight: 0.16% of C, 0.35% of Si, 1.5% of Mn, 0.04% of V, 0.04% of Al, 0.020% of P, 0.01% of S, 97.754% of Fe and inevitable impurities.
Further, a production process of the integrally drawn high-strength seamless steel tube for the automobile axle housing comprises the following steps: converter or electric furnace smelting-deoxidation alloying-refining-continuous casting, protective casting-pipe blank sawing-heating-perforating, adding re-line temperature monitoring-pipe rolling in the perforating procedure, adding re-line temperature monitoring-re-line micro-control cooling in the pipe rolling procedure, adding temperature measurement-micro-tension reduction (diameter fixing) -intermediate cooling bed in the procedure, adding re-line temperature monitoring in the procedure, cooling bed air cooling-straightening-sawing, sampling inspection-flaw detection-surface inspection-jet marking and warehousing; the heating temperature is 1170-1240 ℃, the soaking temperature is 1230-1260 ℃, the initial rolling temperature is 1230-1250 ℃, the grading micro-controlled cooling pressure after rolling is 0.5-0.8MPa, the final rolling temperature is 850-880 ℃, the temperature of the upper cooling bed of the seamless pipe is 830-860 ℃, and the tissue transformation time is controlled at 480-700 s.
The invention has the beneficial effects that: provides a high-strength seamless steel tube for an integrated drawn automobile axle housing and a production process thereof. On the premise of reducing the use amount of precious alloys, different production processes are formulated for different axles, on the premise of meeting the axle processing quality, the links of an on-line normalizing process or a heat treatment process are reduced, and the comprehensive performance of the product is improved. The narrow composition control of the alloy elements is realized on the chemical composition; the key temperature control in the rolling process realizes the stability of the seamless steel tube structure and the excellence of the mechanical property. The yield strength is 390-450 MPa, the tensile strength is 490-600 MPa, the elongation after fracture is 25% -28.5%, the structure F + P, the grain size is 7.0-8.0 grade, the normal temperature longitudinal impact is 210J-250J, and the low temperature impact energy at-20 ℃ is 80J-100J. By controlling the V, N content in the steel, the formation and the precipitation of V (C, N) fine particles are promoted, the technological parameters of steelmaking and steel rolling are strictly controlled, the strength, the toughness and the impact energy of the seamless steel pipe are obviously improved, and the links of an on-line normalizing process or a heat treatment process are reduced. The performance index after the automobile axle housing is processed is met, and the automobile axle housing has the practical significance of energy saving, cost reduction, safety and environmental protection.
The specific implementation mode is as follows:
example one
The high-strength seamless steel tube for the integrally drawn automobile axle housing comprises, by weight, 0.13% of C, 0.2% of Si, 1.35% of Mn, 0.027% of V, 0.02% of AL, 0.006% of P, 0.004% of S, and 98.263% of Fe and inevitable impurities.
Example two
The high-strength seamless steel tube for the integrally drawn automobile axle housing comprises the following components in percentage by weight: 0.145% of C, 0.275% of Si, 1.425% of Mn, 0.0335% of V, 0.03% of AL, 0.013% of P, 0.07% of S, 98.0085% of Fe and inevitable impurities.
EXAMPLE III
The components and weight percentages of the high-strength seamless steel tube for the integrally drawn automobile axle housing are as follows: 0.16% of C, 0.35% of Si, 1.5% of Mn, 0.04% of V, 0.04% of Al, 0.020% of P, 0.01% of S, 97.754% of Fe and inevitable impurities.
Example four
A production process of an integrally drawn high-strength seamless steel tube for an automobile axle housing comprises the following steps: converter or electric furnace smelting-deoxidation alloying-refining-continuous casting, protective casting-pipe blank sawing-heating-perforating, adding re-line temperature monitoring-pipe rolling in the perforating procedure, adding re-line temperature monitoring-re-line micro-control cooling in the pipe rolling procedure, adding temperature measurement-micro-tension reduction (diameter fixing) -intermediate cooling bed in the procedure, adding re-line temperature monitoring in the procedure, cooling bed air cooling-straightening-sawing, sampling inspection-flaw detection-surface inspection-jet marking and warehousing; the heating temperature is 1200 ℃, the soaking temperature is 1245 ℃, the starting rolling temperature is 1240 ℃, the grading micro-controlled cooling pressure after rolling is 0.65MPa, the finishing rolling temperature is 865 ℃, the temperature of the upper cooling bed of the seamless pipe is 845 ℃, and the tissue transformation time is 590 s. The production process of the drawn automobile axle housing by expanding and molding the steel pipe has the advantages of quick axle molding, no welding seam, stable performance and the like, and can be used for mass production. The low-temperature impact, the ductility, the strength and other properties are excellent. At present, manufacturers purchasing axle tubes produced by the new process of our company have increased to 3, the annual sales volume is 2000 tons in 2018, 2 ten thousand tons in 2020 is broken through, and huge market economic benefits are obtained.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, which are not to be construed as limiting the invention to the specific embodiments described above. Numerous other simplifications or substitutions may be made without departing from the spirit of the invention as defined in the claims and the general concept thereof, which shall be construed to be within the scope of the invention.
Claims (5)
1. The utility model provides an integral type draws high strength seamless steel pipe for automobile axle housing which characterized in that: the steel pipe comprises the following components in percentage by weight: 0.13-0.16% of C, 0.2-0.35% of Si, 1.35-1.5% of Mn, 0.027-0.04% of V, 0.02-0.04% of AL, less than or equal to 0.02% of P, less than or equal to 0.01% of S, and the balance of Fe and inevitable impurities.
2. The integrally drawn high-strength seamless steel tube for the automobile axle housing as claimed in claim 1, wherein: the steel pipe comprises, by weight, 0.13% of C, 0.2% of Si, 1.35% of Mn, 0.027% of V, 0.02% of Al, 0.006% of P, 0.004% of S, and 98.263% of Fe and inevitable impurities.
3. The integrally drawn high-strength seamless steel tube for the automobile axle housing as claimed in claim 1, wherein: the steel pipe comprises the following components in percentage by weight: 0.145% of C, 0.275% of Si, 1.425% of Mn, 0.0335% of V, 0.03% of AL, 0.013% of P, 0.07% of S, 98.0085% of Fe and inevitable impurities.
4. The integrally drawn high-strength seamless steel tube for the automobile axle housing as claimed in claim 1, wherein: the steel pipe comprises the following components in percentage by weight: 0.16% of C, 0.35% of Si, 1.5% of Mn, 0.04% of V, 0.04% of Al, 0.020% of P, 0.01% of S, 97.754% of Fe and inevitable impurities.
5. The production process of the integrally drawn high-strength seamless steel tube for the automobile axle housing, disclosed by claim 1, is characterized by comprising the following steps of: the production process comprises the following steps: converter or electric furnace smelting-deoxidation alloying-refining-continuous casting, protective casting-pipe blank sawing-heating-perforating, adding re-line temperature monitoring-pipe rolling in the perforating procedure, adding re-line temperature monitoring-re-line micro-controlled cooling in the pipe rolling procedure, adding temperature measurement-micro-tension reducing-middle cooling bed in the procedure, adding re-line temperature monitoring-cooling bed air cooling-straightening-sawing in the procedure, sampling inspection-flaw detection-surface inspection-jet marking and warehousing; the heating temperature is 1170-1240 ℃, the soaking temperature is 1230-1260 ℃, the initial rolling temperature is 1230-1250 ℃, the grading micro-controlled cooling pressure after rolling is 0.5-0.8MPa, the final rolling temperature is 850-880 ℃, the temperature of the upper cooling bed of the seamless pipe is 830-860 ℃, and the tissue transformation time is controlled at 480-700 s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011462481.XA CN112662949B (en) | 2020-12-14 | 2020-12-14 | High-strength seamless steel tube for integrally drawn automobile axle housing and production process thereof |
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| CN202011462481.XA CN112662949B (en) | 2020-12-14 | 2020-12-14 | High-strength seamless steel tube for integrally drawn automobile axle housing and production process thereof |
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| CN112662949A true CN112662949A (en) | 2021-04-16 |
| CN112662949B CN112662949B (en) | 2021-12-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05117748A (en) * | 1991-10-25 | 1993-05-14 | Sumitomo Metal Ind Ltd | Production of high-strength electric resistance welded tube |
| CN104878291A (en) * | 2015-06-11 | 2015-09-02 | 达力普石油专用管有限公司 | Seamless line pipe with yield strength being 350MPa and preparation method thereof |
| CN107746916A (en) * | 2017-11-06 | 2018-03-02 | 山东墨龙石油机械股份有限公司 | A kind of manufacture method of oil cylinder seamless steel pipe |
| US20180187277A1 (en) * | 2014-06-25 | 2018-07-05 | Baoshan Iron & Steel Co.,Ltd. | High-toughness seamless steel tube for automobile safety airbag and manufacturing method therefor |
| CN108315669A (en) * | 2017-12-29 | 2018-07-24 | 天津磊峰实业有限公司 | A kind of high-strength vehicle sedan-chair shell steel plate manufacturing process |
| CN111304533A (en) * | 2020-03-09 | 2020-06-19 | 包头钢铁（集团）有限责任公司 | Low-alloy special axle seamless steel tube and preparation method thereof |
-
2020
- 2020-12-14 CN CN202011462481.XA patent/CN112662949B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05117748A (en) * | 1991-10-25 | 1993-05-14 | Sumitomo Metal Ind Ltd | Production of high-strength electric resistance welded tube |
| US20180187277A1 (en) * | 2014-06-25 | 2018-07-05 | Baoshan Iron & Steel Co.,Ltd. | High-toughness seamless steel tube for automobile safety airbag and manufacturing method therefor |
| CN104878291A (en) * | 2015-06-11 | 2015-09-02 | 达力普石油专用管有限公司 | Seamless line pipe with yield strength being 350MPa and preparation method thereof |
| CN107746916A (en) * | 2017-11-06 | 2018-03-02 | 山东墨龙石油机械股份有限公司 | A kind of manufacture method of oil cylinder seamless steel pipe |
| CN108315669A (en) * | 2017-12-29 | 2018-07-24 | 天津磊峰实业有限公司 | A kind of high-strength vehicle sedan-chair shell steel plate manufacturing process |
| CN111304533A (en) * | 2020-03-09 | 2020-06-19 | 包头钢铁（集团）有限责任公司 | Low-alloy special axle seamless steel tube and preparation method thereof |
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Denomination of invention: High strength seamless steel pipe and its production process for integrated drawn automotive axle housing Granted publication date: 20211217 Pledgee: Shuangyashan Rural Commercial Bank Co.,Ltd. Yaodi Branch Pledgor: HEILONGJIANG JIANLONG IRON & STEEL Co.,Ltd. Registration number: Y2024230000017 |